Adjustable arms are a PITA, been there done that...nope. The JKS arms use proper bushings and do the job with a lot less hassle.
PITA how? You set them up and then forget about them. If that's a hassle for you then I don't know what to tell you. Sure you can get caster in the ballpark with fixed arms assuming they match the spring height you're running, but it's not the same. Ideally you should be running 6-6.5° caster which those fixed arms aren't going to do. These JLs are ultra sensitive to caster so you want it to be dialed in. You do you though.
Well the JKS arms are longer than the Mopar LCAs and I plan to run just 2-2.5 inches of lift so I already know they'll be fine and give me the right amount of caster. Now if I went crazy and did a bigger lift then it would be a concern but I care about performance more than just "big lift more better" like so many others. I have done my homework.
